Wrench



(No Model.)

A. B. STONE.

' WRENCH.

Patented Nov. 19, 18195.

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ARTHUR STONE, OF IVINDSOR, CONNECTICUT.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 550,144, dated November19, 1895. Application filed February 27, 1895. Serial No. 539,895. (Nomodel.)

To all whom t may concern:

Be it known that I, ARTHUR B. STONE, a citizen of the United States,residing at Windsor, in the county of Hartford and State of Connecticut,have invented certain new and useful Improvements in Vrenches, of whichthe following is a specification.

My invention relates to improvements n wrenches; and the chief objectsof my improvement are to provide means for positively locking the movingjaw in place, to permit the moving jaw to have a quick sliding Inovement over the jaw-adjusting screw, while it may, when desired, bemoved by the screw, and to furnish a rm support for the screw throughoutits length.

In the accompanying drawings,'Figure 1 is a side elevation of my wrenchwith a part broken out to make the view of proportionally less lengththan the wrench. Fig. 2 is a sectional view on the line x of Fig. 1.with some of the parts in elevation; and Fig. 3 is a transverse sectionof the same on the line yy of Fig. 2, looking toward the jaws.

The fixed jaw A is made rigid with the wrench-bar B, said bar havingrounded edges so that it may also serve as a handle. Upon one side it isprovided with a wide groove, partly for the purpose of decreasing itsweight and partly for forming ways or guides for the half-nut 4. In themiddle of this wide groove there is a rounded groove 5 to serve as aseat or support for the jaw-adjusting screw 6, and upon the bottoni ofwhich groove said screw bears for substantially its whole length. Thisscrew is provided with the usual knurled head 7, which projects into' ahole in the wrench-bar, the walls of which hole limit the longitudinalmovement of the screw, while at the same time it is free to rotate whennot locked against rotation, as hereinafter described. The outer endofthe knurled head 7 is bored out centrally or recessed, as shown inFig. 2, and that end of the screw is held in the groove by means of aholding-rod 8, resting in said groove, and secured bya rivet or screw 9with one end of said rod in the bore of said head.

C designates the sliding jaw with substan= tially the usuallframe D onthe wrench-bar, excepting that said frame is not provided with a fixednut for the screw. This frame is recessed upon one side to receive theshank 10 of the swinging half-nut 4, the front end of said shank workingunder the lip 11. A threaded post 12 is secured to a cross-bar of theframe D of the sliding jaw, and on this threaded post is a nut 13,having a peripheral groove 14:, into which the forked end or lip 15 ofthe halfenut fits. I lprefer to secure the post 12 by screwing itsshouldered end firmly into the frame D, as shown in Fig. 2, and toprovide its outer end with a head 16 to limit the outward movement ofthe nut 13; but the manner of afixing the threaded post to the frame isnot essential.

The parts may be assembled by turning the nut 13 to d raw the half-nutout of the way of the screw, sliding the jaw C and frame D on thewrench-bar, inserting the jaw-adj usting screw 6 and dropping itsknurled head into the hole or recess in the wrench-bar, inserting theholding-rod 8 and securing it in place by means of the screw 9.

In use the half-nut may be withdrawn from the screw 6 far enough topermit it to pass the screw without engagement, and thereby enable thesliding jaw to be slipped along on the wrench-bar for a quickadjustment. The half-nut may at any time be forced into properengagement with the screw, while at the same time the screw is free torotate for the purpose of more slowly adjusting the sliding jaw, as inthe ordinary screw-wrench. When so adjusted, it will, in common with theordinary wrench, be very liable to have the sliding jaw set back alittle and loosen or partially loosen its hold on the nut or bolt headto which the wrench -jaws may be applied. In order to overcome thisdefect, I arrange my half-nut in connection with powerapplyingdevices-that is, the threaded post 12 and the nut 13, so that by turningsaid nut with considerable force to bind the half-nut irmly upon thescrew and forcing said screw firmly upon its seat in the bottom of therounded groove in the wrench-bar thesliding jaw may be rigidly locked inplace and made practically as irm as a fixed jaw. Thus it will be seenthat I can use my wrench with a quick movement of the sliding jaw withthe ordinary screw-movement, and, when desired, may lock the sliding jawrigidly in place. In addition to this the screw is so sup- IOO ported asto be free from all liability of bendin I claim as my inventionl. Awrench comprising a fixed jaw and wrench bar, a sliding jaw and itsfralne, the jaw adjusting screw, the half nut for cngaging one side ofsaid screw and means for adjusting said half nut to loosely fit saidscrew or to bind it thereon with sufficient force to prevent therotation of said screw and thereby to lock the sliding jaw againstmovement in either direction, substantially as described.

2. A wrench comprising a wrench bar, jaws, j aw frame, and jaw adjustingscrew, and having an outwardly swinging half nut, the threaded post, thegrooved nut on said post and a lip on the half nut for engaging the nutgroove, substantially as described and for the purpose specified.

A wrench having wrench bar, jaws, and jaw frame, and having also thescrew scat or support extending longitudinally of said wrench bar, thejaw adjusting screw, the hall' nut on that side of said screw which isopposite said seat, and power applying devices for firmly binding thesaid screw between said half nut and the screw-seat, substantially asdescribed and for the purpose specified.

4. A wrench having bar and jaws, the bar being provided with a screwhead-receiving recess and with an open-sided longitudinal grooveextended in both directions from said recess, the jaw adjusting screwhaving an enlarged head fitted to said head-receiving-recess and thescrew holding rod secured in the bottom of said open-sided groove, incontradistinction to being inclosed on all sides, as when in a hole,substantially as described and for the purpose specified.

ARTHUR B. STONE. lVitnesses:

AUSTIN HART, CHAs. H. BEA'roN.

